228 | Page Experimental Investigation of Reinforced Concrete Beam with Rectangular Spiral Shear Reinforcement S.R Wale 1 , Prof. V.R. Rathi 2 ,Prof.Prashant Kanawade 3 1(Department of Civil engineering, Amrutvahini College of Engineering, Sangamner, Maharashtra, (India) 2(Department of Civil engineering, Pravara Rural Engineering College, Loni, Maharashtra , (India) 3(Department of Civil engineering, Pravara Rural Engineering College, Loni, Maharashtra ,( India) ABSTRACT Present study gives the shear behavior of Rectangular spiral reinforced beam of M25 grade of concrete. The spiral reinforcement is use to increase flexural strength of a beam. It is found that shear cracks are proportionally increase with spacing of shear reinforcement it is observed that the longitudinal reinforcement plays very important role to minimize shear cracks. The present experiment carries 27 beams having cross section 2000mm x 150mm x 150mm, 2000mm x 150mm x 300mm, 2000mm x150mm x 450mm. Each set consist of 9 Nos. of beams. In each set 3 beams are control beam and other 6 are made with rectangular spiral shear reinforcement with spacing 100 mm and 150 mm. Experimental result includes ultimate loads & first cracking loads, mid span deflection and crack pattern of the beam. Result shows that beams with rectangular spiral shear reinforcement carries more load compared to control beam and evaluate less deflection compared to control sections. Initial cracks appear for higher loads in case of rectangular spiral reinforced beams Hence rectangular spiral shear reinforcement shows better response in terms of load carrying capacity and deflection at mid span. Keywords- Rectangular spiral reinforcement, shear, Control beams, tests I. INTRODUCTION Reinforced concrete is most widely accepted material for the rapid urbanization of city. It is widely used in the construction industry all over the world. The use of reinforced concrete has increased due to its noticeable advantages like high modulus of elasticity, freeze thaw resistance, chemical resistance, low creep, shrinkage and permeability. A predominant failure mode of beam members is shear failure and the shear action leads to compression in a diagonal direction and tension in a perpendicular to it. The following factors are influenced the shear behavior of beams. The various factors are (i) Shear span to effective depth ratio (a/d) (ii) Longitudinal reinforcement steel ratio (ρ) (iii) Aggregate type (iv) Strength of concrete (v) Type of Loading (vi) Support conditions.
Experimental Investigation of Reinforced Concrete Beam with Rectangular Spiral Shear Reinforcement
May 19, 2023
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